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This commit is contained in:
Rafael Bachmann
2023-10-15 23:45:44 +02:00
parent 66e62e9994
commit 31d4516516
12 changed files with 123 additions and 143 deletions
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41
embassy-usb/src/lib.rs
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@ -24,12 +24,12 @@ use embassy_futures::select::{select, Either};
use heapless::Vec;
pub use crate::builder::{Builder, Config, FunctionBuilder, InterfaceAltBuilder, InterfaceBuilder};
use crate::config::*;
use crate::control::*;
use crate::descriptor::*;
use crate::config::{MAX_HANDLER_COUNT, MAX_INTERFACE_COUNT};
use crate::control::{InResponse, OutResponse, Recipient, Request, RequestType};
use crate::descriptor::{descriptor_type, lang_id};
use crate::descriptor_reader::foreach_endpoint;
use crate::driver::{Bus, ControlPipe, Direction, Driver, EndpointAddress, Event};
use crate::types::*;
use crate::types::{InterfaceNumber, StringIndex};
/// The global state of the USB device.
///
@ -364,6 +364,8 @@ impl<'d, D: Driver<'d>> UsbDevice<'d, D> {
}
async fn handle_control_in(&mut self, req: Request) {
const DEVICE_DESCRIPTOR_LEN: usize = 18;
let mut resp_length = req.length as usize;
let max_packet_size = self.control.max_packet_size();
@ -371,7 +373,6 @@ impl<'d, D: Driver<'d>> UsbDevice<'d, D> {
// The host doesn't know our EP0 max packet size yet, and might assume
// a full-length packet is a short packet, thinking we're done sending data.
// See https://github.com/hathach/tinyusb/issues/184
const DEVICE_DESCRIPTOR_LEN: usize = 18;
if self.inner.address == 0 && max_packet_size < DEVICE_DESCRIPTOR_LEN && max_packet_size < resp_length {
trace!("received control req while not addressed: capping response to 1 packet.");
resp_length = max_packet_size;
@ -432,7 +433,7 @@ impl<'d, D: Driver<'d>> UsbDevice<'d, D> {
self.control.accept_set_address(self.inner.address).await;
self.inner.set_address_pending = false;
} else {
self.control.accept().await
self.control.accept().await;
}
}
OutResponse::Rejected => self.control.reject().await,
@ -545,9 +546,8 @@ impl<'d, D: Driver<'d>> Inner<'d, D> {
OutResponse::Accepted
}
(Request::SET_CONFIGURATION, CONFIGURATION_NONE_U16) => match self.device_state {
UsbDeviceState::Default => OutResponse::Accepted,
_ => {
(Request::SET_CONFIGURATION, CONFIGURATION_NONE_U16) => {
if self.device_state != UsbDeviceState::Default {
debug!("SET_CONFIGURATION: unconfigured");
self.device_state = UsbDeviceState::Addressed;
@ -561,17 +561,15 @@ impl<'d, D: Driver<'d>> Inner<'d, D> {
for h in &mut self.handlers {
h.configured(false);
}
OutResponse::Accepted
}
},
OutResponse::Accepted
}
_ => OutResponse::Rejected,
},
(RequestType::Standard, Recipient::Interface) => {
let iface_num = InterfaceNumber::new(req.index as _);
let iface = match self.interfaces.get_mut(iface_num.0 as usize) {
Some(iface) => iface,
None => return OutResponse::Rejected,
let Some(iface) = self.interfaces.get_mut(iface_num.0 as usize) else {
return OutResponse::Rejected;
};
match req.request {
@ -647,9 +645,8 @@ impl<'d, D: Driver<'d>> Inner<'d, D> {
_ => InResponse::Rejected,
},
(RequestType::Standard, Recipient::Interface) => {
let iface = match self.interfaces.get_mut(req.index as usize) {
Some(iface) => iface,
None => return InResponse::Rejected,
let Some(iface) = self.interfaces.get_mut(req.index as usize) else {
return InResponse::Rejected;
};
match req.request {
@ -753,16 +750,12 @@ impl<'d, D: Driver<'d>> Inner<'d, D> {
};
if let Some(s) = s {
if buf.len() < 2 {
panic!("control buffer too small");
}
assert!(buf.len() >= 2, "control buffer too small");
buf[1] = descriptor_type::STRING;
let mut pos = 2;
for c in s.encode_utf16() {
if pos + 2 >= buf.len() {
panic!("control buffer too small");
}
assert!(pos + 2 < buf.len(), "control buffer too small");
buf[pos..pos + 2].copy_from_slice(&c.to_le_bytes());
pos += 2;